REALM, the dominions of a king, a kingdom. The O.Fr. reaume (mod. royaume) was the form first adopted in English, and the modern spelling does not appear fixed till the beginning of the 17th century. The word must be referred to a supposed Med. Lat. regalitnen, from regalis, of or belonging to a rex, king.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)